code: def lognormal(mu, sigma, random_state):
      """
      mu: float or array_like of floats
      sigma: float or array_like of floats
      random_state: an object of numpy.random.RandomState
      """
      return np.exp(normal(mu, sigma, random_state))
  
file_path: nni/nni/parameter_expressions.py
imports: import numpy
label_desc: Use image node_id 9 for calling a global function with example usage: lognormal(mu, sigma, random_state) and returns: np